75649539 has 8 divisors (see below), whose sum is σ = 115275520. Its totient is φ = 43228296.

The previous prime is 75649523. The next prime is 75649543. The reversal of 75649539 is 93594657.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 75649539 - 2⁴ = 75649523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75649549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1801159 + ... + 1801200.

It is an arithmetic number, because the mean of its divisors is an integer number (14409440).

Almost surely, 2^75649539 is an apocalyptic number.

75649539 is a deficient number, since it is larger than the sum of its proper divisors (39625981).

75649539 is a wasteful number, since it uses less digits than its factorization.

75649539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3602369.

The product of its digits is 1020600, while the sum is 48.

The square root of 75649539 is about 8697.6743443291. The cubic root of 75649539 is about 422.9302625227.

The spelling of 75649539 in words is "seventy-five million, six hundred forty-nine thousand, five hundred thirty-nine".